package com.veryreader.d2p.api.modules.ueditor;

import com.baidu.ueditor.ConfigManager;
import com.baidu.ueditor.define.ActionMap;
import com.baidu.ueditor.define.AppInfo;
import com.baidu.ueditor.define.BaseState;
import com.baidu.ueditor.define.State;
import com.baidu.ueditor.hunter.ImageHunter;

import javax.servlet.http.HttpServletRequest;
import java.util.Map;

public class CustomActionEnter {

    private HttpServletRequest request = null;

    private String rootPath = null;
    private String contextPath = null;

    private String actionType = null;

    private CustomConfigManager configManager = null;

    public CustomActionEnter ( HttpServletRequest request, String rootPath ) {

        this.request = request;
        this.rootPath = rootPath;
        this.actionType = request.getParameter( "action" );
        this.contextPath = request.getContextPath();
        this.configManager = CustomConfigManager.getInstance( this.rootPath, this.contextPath, request.getRequestURI() );

    }

    public String exec () {

        String callbackName = this.request.getParameter("callback");

        if ( callbackName != null ) {

            if ( !validCallbackName( callbackName ) ) {
                return new BaseState( false, AppInfo.ILLEGAL ).toJSONString();
            }

            return callbackName+"("+this.invoke()+");";

        } else {
            return this.invoke();
        }

    }

    public String invoke() {

        if ( actionType == null || !ActionMap.mapping.containsKey( actionType ) ) {
            return new BaseState( false, AppInfo.INVALID_ACTION ).toJSONString();
        }

        if ( this.configManager == null || !this.configManager.valid() ) {
            return new BaseState( false, AppInfo.CONFIG_ERROR ).toJSONString();
        }

        State state = null;

        int actionCode = ActionMap.getType( this.actionType );

        Map<String, Object> conf = null;

        switch ( actionCode ) {

            case ActionMap.CONFIG:
                return this.configManager.getAllConfig().toString();

            case ActionMap.UPLOAD_IMAGE:
            case ActionMap.UPLOAD_SCRAWL:
            case ActionMap.UPLOAD_VIDEO:
            case ActionMap.UPLOAD_FILE:
                conf = this.configManager.getConfig( actionCode );
                state = new CustomUploader( request, conf ).doExec();
                break;

            case ActionMap.CATCH_IMAGE:
                conf = configManager.getConfig( actionCode );
                String[] list = this.request.getParameterValues( (String)conf.get( "fieldName" ) );
                state = new ImageHunter( conf ).capture( list );
                break;

            case ActionMap.LIST_IMAGE:
            case ActionMap.LIST_FILE:
                conf = configManager.getConfig( actionCode );
                int start = this.getStartIndex();
                state = new CustomFileManager( conf ).listFile( start );
                break;
            default:

        }

        return state.toJSONString();

    }

    public int getStartIndex () {

        String start = this.request.getParameter( "start" );

        try {
            return Integer.parseInt( start );
        } catch ( Exception e ) {
            return 0;
        }

    }

    /**
     * callback参数验证
     */
    public boolean validCallbackName ( String name ) {

        if ( name.matches( "^[a-zA-Z_]+[\\w0-9_]*$" ) ) {
            return true;
        }

        return false;

    }

}
